| Patents for C23C 22 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals (14,001) |
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| 11/03/1981 | US4298661 A film of manganic hydroxide on a protective coating of manganese; corrosion resistance |
| 11/03/1981 | US4298405 Contacting ferrous metal surface with aqueous acidic solution containing orthophosphate ions and activating nitrite ions |
| 11/03/1981 | US4298404 Chromium-free or low-chromium metal surface passivation |
| 10/27/1981 | CA1111207A1 Low temperature microcrystalline zinc phosphate coatings, compositions, and processes for using and preparing the same |
| 10/21/1981 | EP0038122A1 Forming corrosion-resistant coatings upon the surfaces of metals, especially zinc |
| 10/21/1981 | EP0038097A1 Method for the application of insulating layers to a sheet or strip of steel or iron |
| 10/13/1981 | US4294808 Rotation |
| 10/13/1981 | US4294627 Treatment of tinplate surfaces |
| 10/13/1981 | US4294626 Method for the treatment of surfaces and apparatus employed in said method |
| 10/13/1981 | CA1110611A1 Preparation of metals for cold forming |
| 10/06/1981 | US4293349 Protective compositions for steel surfaces and the process for their preparation |
| 10/01/1981 | WO1981002749A1 Composition for inhibiting corrosion of metal surfaces |
| 09/30/1981 | EP0036689A1 Method of applying phosphate coatings |
| 09/29/1981 | US4292096 Phosphating process of metal surface |
| 09/29/1981 | US4292094 Process for increasing the corrosion resistance of nitrided structural parts made of iron material |
| 09/29/1981 | CA1109772A1 Process of producing an electrically insulative glass film on silicon steel |
| 09/15/1981 | US4289638 Metal treatment |
| 09/15/1981 | US4289586 Without explosion or fire |
| 09/15/1981 | US4289547 Phosphate coating emulsion containing iron chelating agent |
| 09/15/1981 | US4289546 Emulsifiers, corrosion inhibiting agent, phosphate coating |
| 09/09/1981 | EP0035193A1 Process for producing cold rolled steel strip having an excellent phosphatizing property |
| 09/08/1981 | US4288492 Silicates or borates dispersed in curable polymeric coating |
| 09/02/1981 | EP0034842A1 Liquid composition for phosphating metal surfaces |
| 09/01/1981 | US4287004 In which phosphating solution is undulated |
| 08/20/1981 | WO1981002311A1 Method of producing conversion coatings |
| 08/19/1981 | EP0034040A1 Method of producing conversion coatings |
| 07/28/1981 | US4281037 Cleaning and priming composition containing titanium acetylacetonate and method |
| 07/28/1981 | CA1105879A1 Treatment of metal parts to provide rust-inhibiting coatings |
| 07/28/1981 | CA1105814A1 Method and material for treatment of surfaces |
| 07/22/1981 | EP0032306A1 Aluminium-coating solution, process and concentrate |
| 07/14/1981 | US4278477 Coating zinc with cobalt, iron, nickel or tin |
| 07/07/1981 | US4277292 Ternary corrosion resistant coatings |
| 07/01/1981 | EP0031103A1 Method for the pretreatment of metal surfaces prior to phosphatizing |
| 06/30/1981 | CA1104039A2 Phosphating method |
| 06/16/1981 | US4273592 On aluminum, zirconium and/or hafnium source, fluoride, and polyhydroxy compound |
| 05/28/1981 | WO1981001424A1 A process for the preparation of a dark-coloured,wave-length selective oxide film on aluminium |
| 05/27/1981 | EP0029257A1 Substrate coated with a corrosion-resistant black layer and process for obtaining such a substrate |
| 05/26/1981 | US4269633 Controlling the potential difference between the surface and a reference electrode in a coloring liquor; accurate for rough surfaces |
| 05/26/1981 | CA1101612A1 Acidic zinc phosphate solution and method |
| 05/12/1981 | US4266988 Composition and process for inhibiting corrosion of ferrous or non-ferrous metal surfaced articles and providing receptive surface for synthetic resin coating compositions |
| 05/12/1981 | US4266975 Anticorrosive coating composition |
| 05/05/1981 | US4265677 Phosphatizing prior to cathodic electropainting |
| 05/05/1981 | CA1100303A1 Method of manufacturing oxidizing agent and method of oxidation by the use of the oxidizing agent |
| 04/28/1981 | US4264651 Method for calcite coating on the inner surface of pipes |
| 04/28/1981 | US4264379 Organo phosphonic acid, oxidizer |
| 04/28/1981 | US4264378 Chromium-free surface treatment |
| 04/28/1981 | US4264377 Material for treatment of surfaces |
| 04/21/1981 | US4263059 Containing fluoride and an acid |
| 04/07/1981 | US4260654 Smooth coating |
| 03/31/1981 | CA1098427A1 Process of phosphating an iron substrate |
| 03/31/1981 | CA1098269A1 Solid or molten reagent treatment of metal tire cord |
| 03/31/1981 | CA1098254A1 Method for forming a carbide layer of a va group element of the periodic or chromium on the surface of a ferrous alloy article |
| 03/31/1981 | CA1098253A1 Zirconium/titanium coating solution for aluminum surfaces |
| 03/24/1981 | US4257828 Coatings having good corrosion resistance and good adhesion with paints |
| 03/18/1981 | EP0025236A1 Reactive lubricant and process for the preparation of metals for cold forming |
| 03/10/1981 | US4255213 Method for producing solar collector plates |
| 03/10/1981 | US4255205 Method of producing grain-oriented silicon steel sheets having substantially no glass film |
| 02/24/1981 | US4252575 Producing hydrous oxide of controlled thickness on aluminum capacitor foil |
| 02/18/1981 | EP0024062A1 Reactive lubricant and process for the preparation of metals for cold forming |
| 02/17/1981 | US4250727 A layer of artificial oxide serves as an antisticking agent |
| 02/17/1981 | CA1095886A1 Magnesium-containing complexes, method for their preparation, and compositions containing the same |
| 02/10/1981 | US4249966 Method of forming a forsterite insulating film on the surface of a grain-oriented silicon steel sheet |
| 02/10/1981 | US4249964 Process for the chemical and thermal treatment of steel parts to improve the strength properties thereof |
| 01/27/1981 | US4247344 Water soluble polymer mixed with tannic acid |
| 01/27/1981 | CA1094430A1 Tannin treatment of aluminum with a fluoride cleaner |
| 01/13/1981 | US4245123 Oxidizing polyoxyethylene or polyoxypropylene glycol |
| 01/13/1981 | CA1093434A1 Treating aluminum with tannin and lithium |
| 01/07/1981 | EP0021602A1 Treatment of tin plate surfaces against sulphide staining |
| 01/06/1981 | US4243434 Composition for coating metal-working tools |
| 12/30/1980 | US4242155 Method of forming an insulating film on a grain-oriented silicon steel sheet |
| 12/23/1980 | CA1092264A1 Coating galvanized wire |
| 12/23/1980 | CA1091914A1 Metal surface treatment liquid and rust preventive paint |
| 12/10/1980 | EP0019897A1 Process for obtaining conversion coatings on metallic surfaces by spraying |
| 12/09/1980 | US4238534 Colloidal silica, monobasic phosphate, fine particle oxide, chromate |
| 12/09/1980 | US4238250 Process for dyeing zinc and zinc alloys |
| 11/26/1980 | EP0019430A1 Composition and process for zinc phosphate coating a metal surface and a process for painting the coated surface |
| 11/25/1980 | US4235947 Method for the manufacture of a steel sheet adapted for use in ironing processing having good lubrication property |
| 11/25/1980 | CA1090237A1 Treatment of zinc surfaces |
| 11/25/1980 | CA1090236A1 Phosphating method |
| 11/25/1980 | CA1090210A1 Process for producing good adherence between metal and polysulphide material, and articles obtained thereby |
| 11/12/1980 | EP0018841A1 Composition and process for zinc-phosphate coating a metal surface, coated metal surface and a process for painting the coated surface |
| 11/11/1980 | US4233088 Phosphatization of steel surfaces and metal-coated surfaces |
| 11/11/1980 | US4233087 Phosphate coating process |
| 11/04/1980 | US4231812 Surface treatment of metal strip |
| 11/04/1980 | CA1088821A1 Process for producing solar collectors |
| 10/28/1980 | US4230507 Method for sulfurizing cast iron |
| 10/28/1980 | CA1088404A1 Absorption surface of solar collector |
| 10/28/1980 | CA1088386A1 Method for forming a heat-resistant coating on an oriented silicon steel sheet |
| 10/15/1980 | EP0017302A1 Method of rinsing during the phosphatizing of metals |
| 10/15/1980 | EP0017243A1 Anticorrosive coating composition |
| 10/14/1980 | US4228221 Ultraviolet treatment of organic titanate on metal surface |
| 10/14/1980 | US4227946 Chromic acid and chromium phosphate |
| 10/01/1980 | EP0016298A1 A solution for imparting tarnish resistance on aluminium surfaces and method for applying it |
| 09/30/1980 | US4225351 Non-chromate conversion coatings |
| 09/30/1980 | US4225350 Nontoxic solution of sulfuric acid, hydrogen peroxide, silicate, and a cationic triarylmethane dye |
| 09/23/1980 | CA1086194A1 Silicon steel and processing therefore |
| 09/17/1980 | EP0015336A1 Method of cleaning metals |
| 09/16/1980 | US4222779 Sulfuric acid, hydrogen peroxide, silicon dioxide |
| 09/03/1980 | EP0015021A1 Process for the pretreatment of metal surfaces for electrophoretic dip painting |
| 09/03/1980 | EP0015020A1 Process for the surface treatment of metals and its use for the treatment of aluminium surfaces |